Bringing about the removal of a great day from the enquiry (11)

I believe the answer is:

instigation

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'bringing about the removal' is the definition.
I can't tell whether this defines the answer.

'a great day from the enquiry' is the wordplay.
'a great day' becomes 've' (abbreviation for Victory in Europe Day).
'from' indicates named letters should be taken away.
'the enquiry' becomes 'investigation' (investigation is a kind of enquiry).
'investigation' with 've' taken out is 'INSTIGATION'.

'of' is the link.

Can you help me to learn more?

(Another definition for instigation that I've seen is " Initiation, prompting".)

I've seen this clue in The Irish Independent.

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